init_glinet: Initialize the network
In vojta-bartak/glinet:

Initializes the network net by a set of points xy and their corresponding weights w.

1	init_glinet(net, xy, w)

`net`	A glinet object.
`xy`	A table-like object (data.frame or matrix) with two columns for x and y coordinates, representing the set of points (observations or events) whose density should be estimated on the network.
`w`	A numeric vector (of the same length as the number of points in xy) of weights. Each weight will be distributed to the nearest two vertices of the network.